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t <br />ii <br />LIST OF TABLES <br />0 <br />Page <br />Table <br />1. Initial concentrations of ions in each <br />compartment of the TDS preference chamber, ................. 13 <br />10 2. Water quality of Willow Beach National Fish <br /> <br />Hatchery and Utah Water Research Laboratory ................ 16 <br />3. Temperature distribution statistics for razorback <br />suckers, comparison of day and night values ................ 18 <br />4. Temperature selection of four Colorado River fishes........ 22 <br />5. Analysis of variance of acute thermal preferenda <br />of Colorado squawfish ...................................... 35 <br />6. Fisher's (protected) least significant difference <br />of juvenile squawfish at different acclimation . <br />temperatures ............................................... 36 <br />7. Hematological characteristics of four Colorado <br />River fishes (n = 56 razorbacks, 30 juvenile <br />squawfish, 19 adult squawfish, 30 humpbacks, <br />and 31 bonytails) .......................................... 53 <br />8. Baseline hematology of three species of commonly <br />cultured fish .............................................. 56 <br />9. Comparison of refractometric and colorometric <br />methods for determining hemoglobin and total <br />protein levels in the Colorado squawfish and <br />razorback sucker. A t-test was employed to <br />compare means obtained by the two methods .................. 58 <br />. 10. Swimming performance (minutes to fatigue) of <br />razorback suckers (15-30 cm in length) at <br />different water temperatures and velocities. <br />A test was discontinued when a fish swam for <br />120 min .................................................... 62 <br />. 11. Analysis of variance of effects of water velocity <br />(main effect) temperature (main effect), and fish <br />length (covariate) on swimming-time-to-fatigue of <br />four Colorado River fishes ................................. 63 <br />a <br />0